made auth type optional in constructor

rhodecode/lib/smtp_mailer.py

@@ -36,11 +36,10 b' from email.utils import formatdate'
 from email import encoders
 
 
-
 class SmtpMailer(object):
     """SMTP mailer class
 
-    mailer = SmtpMailer(mail_from, user, passwd, mail_server,
+    mailer = SmtpMailer(mail_from, user, passwd, mail_server, smtp_auth
                         mail_port, ssl, tls)
     mailer.send(recipients, subject, body, attachment_files)
 
@@ -50,7 +49,7 b' class SmtpMailer(object):'
 
     """
 
-    def __init__(self, mail_from, user, passwd, mail_server,smtp_auth,
+    def __init__(self, mail_from, user, passwd, mail_server, smtp_auth=None,
                     mail_port=None, ssl=False, tls=False, debug=False):
 
         self.mail_from = mail_from
@@ -163,3 +162,4 b' class SmtpMailer(object):'
             #just for safe seek to 0
             msg_file.seek(0)
             return msg_file.read()
+